IACR News item: 17 June 2013
Kwangsu Lee, Dong Hoon Lee, Moti Yung
ePrint ReportIn this paper, we propose an improved SAS scheme that has a shorter signature size compared with that of Lee et al.\'s SAS scheme. Our SAS scheme is also secure without random oracles under static assumptions. To achieve the improvement, we devise a new public-key signature scheme that supports multi-users and public re-randomization. Compared with the SAS scheme of Lee et al., our SAS scheme employs new techniques which allow us to reduce the size of signatures by increasing the size of the public keys (obviously, since signature compression is at the heart of aggregate signature this is a further step in understanding the aggregation capability of such schemes).
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